Earlier quoted context omitted.
You are discounting the difficulty of getting typical consumers (not "high travel group of tech") to install a 3rd, 4th, 5th app to perform the same function that Uber and Lyft already do. And when you are in a hurry, you might check 2 apps, but will you check and compare 5?
Yeah, I got my parents to start using Uber. They are not very technologically literate and could definitely not be bothered to download a new app to save 10%.
The car is $30-50k with a lifetime of what, 10 years?
The driver needs to earn $40k/yr.
The vast majority of the cost is the driver - insurance and fuel are next, ultimately followed by vehicle capex and maintenance.
Also don't underestimate the amount of local news coverage the driverless taxi will get - combined with the "there's no rude, smelly person driving me".